HD74HC245
Octal Bus Transceivers (with 3-state outputs)
Description
Each device has an active low enable input
G and a direction control input, DIR. When DIR is high, data
flows from the A inputs to the B outputs. When DIR is low, data flows from the B inputs to the A outputs.
The HD74HC245 transfers true data from one bus to the other. This device does not have schmitt trigger
inputs.
Features
High Speed Operation: t
pd
= 8 ns typ (C
L
= 50 pF)
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: V
CC
= 2 to 6 V
Low Input Current: 1 A max
Low Quiescent Supply Current: I
CC
(static) = 4 A max (Ta = 25C)
Function Table
Enable G
Direction Control DIR
Operation
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
H :
high level
L
:
low level
X :
irrelevant
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